化简 (lg5)^2+(lg2)lg50

发布时间:2021-02-25 13:30:53

化简 (lg5)^2+(lg2)lg50

网友回答

(lg5)^2+(lg2)lg50
=(lg5)^2+(lg2)lg5*10
=(lg5)^2+(1-lg5)(lg5+1)
=(lg5)^2+[1-(lg5)^2]
=1======以下答案可供参考======
供参考答案1:
(lg5)^2+lg2*lg50
=(lg5)^2+lg2(lg5+1)
=lg5(lg5+lg2)+lg2
=lg5+lg2
=1
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